smell one's own farts

== English == === Alternative forms === sniff one's own farts === Etymology === Named after the fact that one is liable to become acclimatized to, or even come to like, the smell of one's own farts, whilst still recognizing others' as foul. The acclimatization is likened to becoming out-of-touch with the reality of one's mediocrity. === Verb === smell one's own farts (third-person singular simple present smells one's own farts, present participle smelling one's own farts, simple past and past participle smelled one's own farts) (idiomatic) To become conceited; to believe that one's achievements are greater than they really are.